Requirements for Mexican Citizens holding permanent residence status in the U.S.

To Whom it May Concern,
I'm originally from Mexico and I want to apply for a China tourist Visa to go on a study abroad program with my university for the month of June. I have lived in the U.S. for at least the past ten years and I hold permanent residence status. Other than filling out the Supplemental Visa Application Form , are there other requirements I should be aware of ?

Thank you for your time.

Sincerely,

Jess